SA2K-M3/5AT Equivalent & Substitute Parts

Part Overview

The SA2K-M3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 800 V DC reverse voltage with 2 A average rectified current in a DO-214AC (SMA) package. The part is currently active and ROHS3 compliant with unlimited moisture sensitivity level.

Substitute parts are necessary when the primary part number becomes unavailable due to supply constraints, inventory depletion, or manufacturing discontinuation. Alternative diodes with equivalent or superior electrical characteristics and identical packaging can fulfill the same circuit function while maintaining design specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 2 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	3 @ 1000 V	µA
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SA2K-M3/5AT is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 800 V
Current - Average Rectified (Io): Must equal or exceed 2 A
Package / Case: Must be DO-214AC (SMA) for direct PCB compatibility
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must support -55°C to 150°C minimum

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics
Reverse recovery time (trr)
Reverse leakage current specifications
RoHS and REACH compliance status

Parts are grouped into two categories: Parametric Equivalents (identical electrical specifications) and Manufacturer Recommended Alternatives (superior or modified specifications suitable for the same application).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Package	Product Status	Inventory [Pcs]
SA2K-M3/5AT	Vishay	800	2	1.1 @ 2A	1.5 µs	DO-214AC	Active	1124
SA2K-E3/5AT	Vishay	800	2	1.1 @ 2A	1.5 µs	DO-214AC	Active	7200
SA2K-E3/61T	Vishay	800	2	1.1 @ 2A	1.5 µs	DO-214AC	Active	28500
CGRA4007-G	Comchip Technology	1000	1	1.1 @ 1A	>500ns	DO-214AC	Active	52200
CURA107-G	Comchip Technology	1000	1	1.7 @ 1A	75 ns	DO-214AC	Active	13182
GF1M	onsemi	1000	1	1.2 @ 1A	2 µs	DO-214AC	Not For New Designs	63580
GS1K-LTP	Micro Commercial Co	800	1	1.0 @ 1A	>500ns	DO-214AC	Active	8458
GS1M-LTP	Micro Commercial Co	1000	1	1.0 @ 1A	>500ns	DO-214AC	Active	88005
GS2M-LTP	Micro Commercial Co	1000	2	1.1 @ 2A	>500ns	DO-214AC	Active	26790
MRA4006T3G	onsemi	800	1	1.1 @ 1A	>500ns	DO-214AC	Not For New Designs	45300
MRA4007T3G	onsemi	1000	1	1.1 @ 1A	>500ns	DO-214AC	Not For New Designs	425100

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

The SA2K-E3/5AT and SA2K-E3/61T are direct parametric equivalents manufactured by Vishay. Both parts maintain identical electrical specifications: 800 V reverse voltage, 2 A average rectified current, 1.1 V forward voltage at 2 A, and 1.5 µs reverse recovery time. These parts are Active status and ROHS3 compliant. The SA2K-E3/61T offers superior inventory availability (28,500 pcs) compared to the primary part (1,124 pcs), making it the preferred substitute for immediate availability.

Voltage-Elevated Alternatives (GS2M-LTP):

The GS2M-LTP from Micro Commercial Co maintains the 2 A current rating while providing 1000 V reverse voltage capability (200 V higher than the primary part). This part is suitable for applications requiring enhanced voltage margin. It is Active status, ROHS3 compliant, and offers 26,790 pcs inventory. Forward voltage remains equivalent at 1.1 V @ 2 A.

Current-Reduced Alternatives (Not Recommended for Direct Substitution):

Parts such as CGRA4007-G, CURA107-G, GF1M, GS1K-LTP, GS1M-LTP, MRA4006T3G, and MRA4007T3G all feature 1 A average rectified current, which is insufficient for applications requiring 2 A. These parts do not meet the primary current specification and are not suitable direct substitutes.

Obsolescence Considerations:

GF1M and MRA4007T3G carry "Not For New Designs" status. While MRA4007T3G maintains exceptional inventory (425,100 pcs), its obsolescence designation makes it unsuitable for new circuit designs. GF1M similarly carries obsolescence status despite high inventory levels.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A diode in place of the SA2K-M3/5AT?

A: No. The SA2K-M3/5AT is rated for 2 A average rectified current. Substituting a 1 A diode will result in thermal stress, reduced component lifetime, and potential circuit failure. Current rating must equal or exceed the original specification.

Q: What is the difference between SA2K-M3/5AT, SA2K-E3/5AT, and SA2K-E3/61T?

A: All three parts are manufactured by Vishay with identical electrical specifications: 800 V, 2 A, 1.1 V forward voltage, and 1.5 µs recovery time. The differences are in packaging tape configuration (indicated by the suffix) and inventory availability. SA2K-E3/61T offers the highest stock level at 28,500 pcs.

Q: Can I use GS2M-LTP instead of SA2K-M3/5AT?

A: Yes, with design verification. The GS2M-LTP maintains the 2 A current rating and identical forward voltage (1.1 V @ 2 A) but provides 1000 V reverse voltage instead of 800 V. This represents a voltage upgrade suitable for applications with higher voltage margins. Verify that the higher voltage rating does not introduce unintended circuit behavior.

Q: Why are some substitute parts marked "Not For New Designs"?

A: Parts designated "Not For New Designs" are in obsolescence phase. Manufacturers continue to supply existing inventory but do not recommend these parts for new circuit development. While functional equivalents exist, these parts should not be selected for new designs due to long-term supply uncertainty.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference maintain ROHS3 compliance and are suitable for applications requiring RoHS certification. All parts also maintain REACH Unaffected status.

Q: What is the significance of the DO-214AC (SMA) package?

A: The DO-214AC package, commonly referred to as SMA, is a standardized surface mount package for small-signal and rectifier diodes. All substitute parts maintain this identical package specification, ensuring direct PCB footprint compatibility without layout modifications.

Q: Can I substitute a faster recovery diode like CURA107-G (75 ns) for the standard recovery SA2K-M3/5AT (1.5 µs)?

A: The CURA107-G is not a suitable substitute due to insufficient current rating (1 A vs. 2 A required). However, faster recovery characteristics are generally compatible with standard recovery applications. The primary limitation is the current specification, not the recovery speed.

Q: What inventory levels should I consider for supply chain planning?

A: The primary part SA2K-M3/5AT maintains 1,124 pcs inventory. For improved supply security, SA2K-E3/61T offers 28,500 pcs. GS2M-LTP provides 26,790 pcs with voltage upgrade capability. MRA4007T3G offers the highest inventory at 425,100 pcs but carries obsolescence status and does not meet the 2 A current requirement.

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